Ventilating device



' Feb. 12 1924.. 1,483,232

. W. IMILLER-PEACOCK VENTILATING DEVICE I Filed July,;-24.. 1922 3 Sheets-Sheet 1 Feb. 12 1924a 1 483.232 w. MlLLER-PEACOCK VENTILATING DEVI-CE Filed July 24-, 1.922 asheets sneetfi Patented Feb. 12, 19224.

cries.

VENTILATING DEVICE.

Application filed July 24,

1 0 all whom it may concern:

Be it known that I, VVALTER MILLER- PEAOOCK, a citizen of the United States, residing in the city and county of San F rancisco and State of California, have invented a new and useful Improvement in a Ventilating Device, of which the following is a specification.

My invent-ion relates to improvements in a ventilating device wherein a punka is oscillated with a harmonic movement for circulating air within a room.

The primary object of my invention is to provide an improved air circulating device for ventilating purposes.

Another object is to provide an improved actuating means for oscillating a punka with a true harmonic movement to obtain a smooth and regular circulation of air.

A further object is to provide an improved construction afi'ording compactness and durability, and arranged to give a positive and silent action.

A still further object is to provide a device having a widerange of adjustability.

I accomplish these and other objects which will appear hereinafter by means of the device disclosed in the drawings forming a part of the present specification wherein like characters of reference are used to designate similar parts throughout said specification and drawings, and in which:

Fig. 1 is a front elevation of my improved ventilating device. I

Fig. '2 is a similar View, showing the application of a plurality of punkas, parts of the housing being broken away to show the actuating means. I

Fig. 3 is a vertical sectional. view showing the actuating means upon a larger scale.

Fig. 4 is a horizontal section looking down upon the actuating means.

Fig. 5 is a broken end elevation of the housing showing the manner in which the shaft is mounted therethrough.

Referring to thedrawings the numeral .1 is used to designate in general a housing adjustably mounted upon supporting members 2 by means of nuts 3 and 4: threaded upon the outer ends of the members 2 and engaging opposite sides of flanges 6 secured upon the sides of the housing.

A shaft 7 extends through the housing 1, said shaft being received by bearing plates 8 removably secured upon the ends of the 1922. Serial No. 577,2g2.

housing for a purpose hereinafter more fully described. The outer ends of the shaft 7 are supported by suitable bearing brackets 9. In the preferred construction shown in Fig. 1 of the drawings, the supporting members 2 and the brackets 9 are mounted upon a common base 11 arranged to be secured upon any suitable support, the usual practice being to secure the base 11 upon the ceiling of a room so that the housing and brackets are suspended downwardly into the room.

A punka 12 is secured upon the shaft 7 by means of arms 13. The punka may be of any suitable construction and size suited to the requirements of any particular installation, or if desired a plurality of punkas maybe secured along a single shaft, as shown in Fig. 2 of the drawings, or otherwise mounted for driving from a single shaft in such manner as to obtain the desired circulating effect. The arms 13 are preferably provided with extensions 14% upon which are secured counterweights 16 adapted to partially counterbalance the weight of the punkas to facilitate and give smoothness to the operation of the punkas as hereinafter described.

The shaft 7 is arranged. to be oscillated with a true harmonic movement in the following manner: A pair of gears 17 are secured in spaced relation upon the shaft 7 within the housing 1. A pair of racks 18 are slidably mounted upon guides 19 within the housing, said racks being arranged in meshing relation with the gears 17. Connecting members 21 are secured in parallel spaced relation between the racks 18 to rigidly connect the same.

A member 22 is rotatably mounted between and slightly below the racks 18 upon a bearing 23 secured Upon the bottom of the housing 1. Gear teeth 24 are formed upon the edge of the member 22 and arranged to be engaged by a worm gear 26 secured upon a shaft 27 mounted within suitable bearings 28 within the housing 1. :One end of the shaft 27 extends outwardly through the side of the housing 1 and is provided with a driving pulley 29 secured thereon. Anelectric motor 31 is secured upon the top of the housing 1 and connected to the pulley 29 by means of a belt 32 or other suitable connection. A roller 33 is mounted adjacent the outer edge of the member 22 and arranged to be engaged between the parallel connecting members 21 to impart a reciprocating movement to the racks 18 when the member 22 is rotated by the motor driven worm 26, a corresponding oscillating movement being imparted to the shaft 7 and the punka 12 by virtue of the engagement of the rac s 18 with the gears 17. It will be noted that the racks 18, and hence, the shaft 7 and punkas 12 will be actuated with a true harmonic movement due to the fact that the roller 33 is connected directly upon the rotatable member 22. This movement is important in my present invention as it materially adds to the smoothness and evenness of operation essential in a device of the character I have disclosed.

Th housing 1 is arranged to be filled with oil to a level slightly below the shaft 7 so that the member 22 and drive worm 26 and the racks 18 are entirely covered to obtain a silent drive. A suitable stufiing gland 34 is mounted upon the shaft 27 at the point where said shaft passes through the housing to receive the drive pulley 29 to prevent the loss of oil past the bearing 28. As a further guard against the possible dripping of oil past the stufling gland 34;, the pulley is provided with an inwardly extending annular .[iange 36 arranged toenclose the end of the stufling gland and catch any oil as might leak therepast, this construction being best illustrated in Fig. 4 of the drawings.

The operation of the device is readily seen from the above description, the rotatable member 22 being driven by the motor in the obvious manner and the racks reciprocated to impart the desired oscillating movementto the shaft 7 and the punka 12, the movement of the punka through the air causing the desired displacement and movementof the air. The amount of displace ment of air is proportional to the area of the punka and to the angle through which it is moved. The punka may be made of any desired size as above described. In order to permit the adjustment of the angle through which the punka is oscillated I have provided for adjustment of the housing 1 and the actuating members relative to the shaft 7 whereby larger or smaller gears 17 may be mounted upon the shaft to obtain a corresponding lesser orgreater range of movement of the punka. To facilitate this adjustment I have provided removable hearing plates 8 secured upon the ends of the housing. The plates 8 are apertured to re ceive bearings 37 for the shaft 7, said bearings 37 extending through slots 38 formed in the ends of the housing 1. The slots 38 permit the housing to be adjusted relative to the shaft 7 by means of the flange connection to the supporting members 2 as shown in dotted lines in Fig. 2 of the draW- ings. In this manner, gears 17 of a desired size may be applied upon the shaft 7 and the housing moved to bring the racks into engagement with the gears, the motor and actuating members being moved with the housing. The slots 88 are covered by plates 8 having apertures conforming to the position of the housing relative to the shaft. Plates 8 are provided to conform to each size of gear 17 so that, should it be desired to alter the amount of movement of the punka after installation, the gears 17 and plates 8 only will have to be replaced.

From the above description it will be readily seen that I have PIOX lClOCl an improved device adapted to give a perfectly smooth and regular movement to the air. lVhile I have disclosed the preferred embodiment of my invention, I do not desire to restrict myself to the precise construction and arrangement disclosed, but wish to avail myself of all such modifications as may fall within the scope of the appended claims.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

1. A ventilating device comprising a shaft; a punka secured upon the shaft; gears secured upon the shaft; racks meshing with said gears; a worm driven gear mounted adjacent the racks; and means connecting said worm driven gear with the racks for imparting a reciprocating movement thereto for oscillating the shaft and punka with a true harmonic movement.

2. A ventilating device comprising a housing; a shaft extending transversely through said housing; a pair of gears mounted upon the shaft in spaced relation within the housing; a pair of racks slidablymount ed within the housing, each of said racks being mounted in meshing relation with one of the gears; a worm driven gear mounted within the housing adjacent the racks; a roller mounted upon the worm driven gear adjacent the periphery thereof; connections secured between the racks and arranged to engage the roller whereby rotation of: the worm driven gear will impart a harmonic reciprocating movement to the racks for oscillating the gears and shaft; and a punka connected to said shaft to be oscillated thereby.

3. A ventilating device comprising a shaft; a pair of gears mounted in spaced relation upon said shaft; a pair of racks slidably mounted in meshing relation with the gears; a rotatable member mounted adjacent the racks; means connecting said rotatable member with the racks for reciprocating the same to impart an oscillating movement to the gears and shaft and a punka connected to the shaft to be oscillated thereby.

at. A ventilating device comprising a shaft; a pair of gears mountedin. spaced relation upon said shaft; a pair of racks slidably mounted in meshing relation with the gears; a rotatable member mounted adjacent the racks; means connecting said rota table member with the racks for reciprocating the same with a harmonic movement to oscillate the gears and shaft; means for rotating the rotatable member; and a punka connected to the shaft to be oscillated thereby.

5. A ventilating device comprising a shaft; a pair of gears mounted in spaced relation upon said shaft; a pair of racks slidably mounted in meshing relation with the gears; a rotatable member mounted adjacent the racks; means connecting the rotatable member with the racks for reciprocating the same with a harmonic movement to oscillate the gears and shaft; a power driven worm 'mounted adjacent the rotatable member for imparting rotation thereto; and punkas connected to the shaft to be oscillated thereby.

6. A ventilating device comprising a shaft; a pair of gears mounted in spaced relation upon said shaft; a pair of racks slidably mounted in meshing relation with the gears; a rotatable member mounted adjacent the racks; a power driven worm mounted adjacent the rotatable member and operatively connected thereto for rotating the same; a pair of parallel connecting members secured between the racks; a roller mounted adjacent the periphery of the rotatable member in engagement with the parallel connecting members for reciprocating the racks with a harmonic movement to impart an oscillating movement to the gears and shaft; punkas connected to the shaft to be oscillated thereby; a housing mounted over the shaft to enclose the shaft actuating members; bearing plates secured uponthe ends of the housing to receive the shaft; and means for adjustably supporting the housmg.

7 A ventilating device comprising a shaft; a punka secured upon the shaft; a pair of gears mounted upon the shaft; a pair of racks mounted in meshing relation with the gears; a rotatable member mounted adjacent the racks and operatively connected thereto for reciprocating the same to oscillate the shaft and punka; and means for rotating the rotatable member.

8. In a ventilating device, a shaft; punkas secured upon the shaft; actuating means connected to the shaft for imparting a harmonic oscillating movement to the shaft and punkas; and a housing adjustably mounted over the shaft and enclosing the actuating means substantially as and for the purposes described.

In witness whereof I hereunto set my signature.

WALTER MILLER-PEACOGK. 

